PURPOSE: To obtain coated tool parts having excellent abrasion resistance, plastic deformation resistance and chipping resistance by coating the base body of a super hard alloy formed with surface layers fitting to coating layers with outer layers of a hard phase and inner layers contg. metallic sulfide and having lubricity.
CONSTITUTION: The content of a binding phase consisting of metals is increased in the surface layers of the base body from the surface of the base body consisting of a super hard alloy or cermet down to 2W40μm depth toward the inside part of the base body as compared to the inside part of the base body, whereby the toughness of the resultant parts is improved. Thereafter, the composite layers consisting of the hard phase consistig ≥1 kind among carbide, nitride, boride, carbonitride, oxycarbide, oxynitride, carbonitride and boronitride of group 4a, 5a, and 6a metals, aluminum oxide and aluminum oxynitride and sulfide of metals are formed as the inner coating layers on the surface of the tool parts and the outermost coating layers consisting of the above-mentioned hard layers which are high hard layers are formed.
SHIBUKI KUNIO